Any method we create in a class will automatically be created as an instance method. We must explicitly tell Python that it is a class method using the@classmethoddecorator orclassmethod()function. Class methods
Example 1: Create class method using classmethod() class Person: age = 25 def printAge(cls): print('The age is:', cls.age) # create printAge class method Person.printAge = classmethod(Person.printAge) Person.printAge() Output The age is: 25 Here, we have a class Person, with a...
classExampleClass:class_variable=10print('类属性：',class_variable)@classmethoddefclass_method(cls,x...
Whenever you derive a class from implementing a factory method as a class method, it ensures correct instance creation of the derived class. You can create a static method for the above example but the object it creates, will always be hardcoded as Base class. But, when you use a class m...
use class_method_create book instance use static_method_create book instance 特别说明,静态方法也可以实现上面功能,当静态方法每次都要写上类的名字,不方便。 类中静态方法方法调用静态方法和类方法调用静态方法例子。 下面的代码,静态方法调用另一个静态方法,如果改用类方法调用静态方法,可以让cls代替类, ...
classManager:role="管理员"defcreateClass(self):print("create class")defcreateStu():print("createStu")m=Manager()f=getattr(Manager,"createClass")f(Manager)f=getattr(Manager,"createClass")f(m)role=getattr(Manager,"createStu")role()#对象获取类属性 ...
def class_method_create(cls, title): book = cls(title=title) return book @staticmethod def static_method_create(title): book= Book(title) return book book1 = Book("use instance_method_create book instance") book2 = Book.class_method_create("use class_method_create book instance") ...
class File: # __init__() 在类实例化时触发一次 __init__ 功能,它可以用来初始化配置 def __init__(self): # self 获取这个类的自己的属性或功能时使用它 self.name = "f1" self.create_time = "today" init() 在类实例化时触发一次 init 功能,它可以用来初始化配置;self 获取这个类的自己的属性...
Class methods and static methods can be called using ClassName or by using a class object. The Instance method can be called only using the object of the class. Example: # create objectjessa = Student('Jessa',12)# call instance methodjessa.show()# call class method using the classStudent...
class childB(Base): def __init__(self): print 'creat B ', super(childB, self).__init__() base = Base() a = childA() b = childB() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 输出结果 Base create ...